Below are 2 different program, the goal is to combine them into one program. one of the program is in bold while the other is not so you can tell the apart.

#include

#include

#include

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

SoftwareSerial SIM900(9, 10);

const int trigPin = 8; // Trigger Pin of Ultrasonic Sensor

const int echoPin = 7; // Echo Pin of Ultrasonic Sensor

long duration;

int OilLevel;

int delayTime = 700;

int Current;

float SensorReadEarth;

float sensitivity = 0.185;

int temp;

float TempSensorPin = A0;

float vout;

void setup() {

// put your setup code here, to run once:

pinMode(TempSensorPin,INPUT);

pinMode(trigPin, OUTPUT);

pinMode(echoPin, INPUT);

Serial.begin(9600);

SIM900.begin(9600);

delay(100);

Serial.println("Transformer Monitoring System ");

lcd.begin(20,4);

lcd.print("Project Work");

lcd.setCursor(2,1);

lcd.print("Transformer");

lcd.setCursor(9,1);

lcd.print("Monitoring");

lcd.setCursor(4,2);

lcd.print("System");

delay (delayTime);

lcd.clear();

}

void loop() {

//temperature//

vout = analogRead(TempSensorPin);

vout = (vout * 500) / 1023;

temp = vout;

//CURRENT//

SensorReadEarth = analogRead(A1)*(5.0 / 1023.0); //We read the sensor output

Current = (SensorReadEarth - 2.5)/sensitivity; //Calculate the current value for Transformer

// SENSING OIL LEVEL//

digitalWrite(trigPin, LOW);

delayMicroseconds(2);

digitalWrite(trigPin, HIGH);

delayMicroseconds(10);

digitalWrite(trigPin, LOW);

duration = pulseIn(echoPin, HIGH);

OilLevel = duration * 0.034 / 2;

//LCD PRINTING//

lcd.setCursor(0,0);

lcd.print("Temperature:");

lcd.setCursor(12,0);

lcd.print(temp);

lcd.setCursor(15,0);

lcd.print("C");

lcd.setCursor(0,1);

lcd.print("Oil Level:");

lcd.setCursor(10,1);

lcd.print(OilLevel);

lcd.setCursor(14,1);

lcd.print("CM");

lcd.setCursor(0, 2);

lcd.print("Current:");

lcd.setCursor(14, 2);

lcd.print(Current,2);

lcd.setCursor(16, 2);

lcd.print("A");

delay(600);

condition();

}

void sms()

{

SIM900.print("AT+CMGF=1 ");

SIM900.println("AT + CMGS = \"+233558254026\"");// recipient's mobile number

Serial.println("AT + CMGS = \"+233558254026\"");// recipient's mobile number

SIM900.println("HIGH TRANSFORMER TEMPERATURE"); // message to send

Serial.println("HIGH TRANSFORMER TEMPERATURE");

SIM900.println((char)26); // End AT command with a ^Z, ASCII code 26

Serial.println((char)26);

SIM900.println();

}

void sms1(){

SIM900.print("AT+CMGF=1 ");

SIM900.println("AT + CMGS = \"+233558245026\"");// recipient's mobile number

Serial.println("AT + CMGS = \"+233558245026\"");// recipient's mobile number

SIM900.println("OIL TANK FULL"); // message to send

Serial.println("OIL TANK FULL");

SIM900.println((char)26); // End AT command with a ^Z, ASCII code 26

Serial.println((char)26);

SIM900.println();

}

void sms2(){

SIM900.print("AT+CMGF=1 ");

SIM900.println("AT + CMGS = \"+233558245026\"");// recipient's mobile number

Serial.println("AT + CMGS = \"+233558245026\"");// recipient's mobile number

SIM900.println("LOW OIL LEVEL"); // message to send

Serial.println("LOW OIL LEVEL");

SIM900.println((char)26); // End AT command with a ^Z, ASCII code 26

Serial.println((char)26);

SIM900.println();

}

void sms3(){

SIM900.print("AT+CMGF=1 ");

SIM900.println("AT + CMGS = \"+233558245026\"");// recipient's mobile number

Serial.println("AT + CMGS = \"+233558254026\"");// recipient's mobile number

SIM900.println("FAULT CURRENT"); // message to send

Serial.println("FAULT CURRENT");

SIM900.println((char)26); // End AT command with a ^Z, ASCII code 26

Serial.println((char)26);

SIM900.println();

}

//CONDITIONS

void condition()

{

if (temp > 75)

{

lcd_tempPrint();

sms();

delay(300);

}

if (OilLevel > 800)

{

lcd_oilLevelFULLPrint();

sms1();

delay(1000);

}else if (OilLevel < 300)

{lcd_oilLevelLOWPrint();

sms2();

delay(300);

}

}

// LCD PRINTING CONDITION//

void lcd_oilLevelFULLPrint()

{

lcd.clear();

lcd.setCursor(1,1);

lcd.clear(); //if condition temp for it to print.

lcd.print("OIL TANK FULL");

}

void lcd_oilLevelLOWPrint()

{

lcd.clear();

lcd.setCursor(0,2);

lcd.clear(); //if condition temp for it to print.

lcd.print("OIL LEVEL LOW");

}

void lcd_tempPrint()

{

lcd.clear();

lcd.setCursor(0,0);

lcd.clear(); //if condition temp for it to print.

lcd.print("HIGH TEMPERATURE");

}

#include

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

#define MQPin A1

#define buzzer 6

void setup() {

lcd.begin(16, 2);

pinMode(MQPin, INPUT_PULLUP);

pinMode(buzzer, OUTPUT);

lcd.setCursor(5, 0);

lcd.print("GAS");

lcd.setCursor(3, 1);

lcd.print("DETECTOR");

delay(1000);

lcd.clear();

}

void loop() {

int gas_value = digitalRead(MQPin);

if(gas_value==HIGH)

{

digitalWrite(buzzer, HIGH);

lcd.setCursor(6, 0);

lcd.print("GAS");

lcd.setCursor(3, 1);

lcd.print("DETECTED");

delay(200);

lcd.clear();

delay(200);

}

else

{

lcd.clear();

digitalWrite(buzzer, LOW);

}

}